Which two statements about EIGRP are true？（）

• A、EIGRP supports VLSM， route summarization， and routing update authentication.
• B、If the feasible successor has a higher advertised distance than the successor route， it becomes the primary route.
• C、Passive routes are in the process of being calculated by DUAL.
• D、EIGRP exchanges full routing table information with neighboring routers with every update.
• E、A query process is used to discover a replacement for a failed route if a feasible successor is not identified from the current routing information.